Once-dominant fashion has gone by the wayside
                                
                                
                                    (Newser) -
                                    In case you hadn't noticed, hightop sneakers are on death's door. You can thank big stars like Steve Nash, who's worn low-tops all his life, and Kobe Bryant, whose switch to low-tops last year prompted four of his Lakers teammates to follow suit. Of course, they're not alone. Eighty percent...